Science
The UK’s covid app made a serious difference during the winter surge – OmniChannel Media

The news: Researchers in the UK have calculated that its contact tracing app may have prevented around 600,000 cases of covid-19. The announcement is good news for the systemwhich underwent serious teething problemsand a step forward for exposure notification systems more generally.
What they found: The study by a team of Oxford researchers modeled the impact of 1.5 million notifications that had been sent by the UKs NHS app between October 1 and December 31, when almost 2 million people were infected…
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